upstream/mercurial-mirror Files · mercurial/worker.py

worker: count the number of CPUs...

worker: count the number of CPUs This works on the major platforms, and falls back to a safe guess of 1 elsewhere.

Bryan O'Sullivan - - Load All Authors

File last commit:

r18635:fed06dd0 default


                r18635:fed06dd0

default

Download file

             worker.py
        
                    29 lines
            
             | 646 B
            
                | text/x-python
            
             |
                PythonLexer
            
             / mercurial / worker.py
          
                    History
                
                 |
                  Annotation
                 | Raw
                 |Copy content
                 |Copy permalink

      # worker.py - master-slave parallelism support

      #

      # Copyright 2013 Facebook, Inc.

      #

      # This software may be used and distributed according to the terms of the

      # GNU General Public License version 2 or any later version.

      import os

      def countcpus():

          '''try to count the number of CPUs on the system'''

          # posix

          try:

              n = int(os.sysconf('SC_NPROCESSORS_ONLN'))

              if n > 0:

                  return n

          except (AttributeError, ValueError):

              pass

          # windows

          try:

              n = int(os.environ['NUMBER_OF_PROCESSORS'])

              if n > 0:

                  return n

          except (KeyError, ValueError):

              pass

          return 1

	Site-wide shortcuts
/	Use quick search box
g h	Goto home page
g g	Goto my private gists page
g G	Goto my public gists page
g 0-9	Goto bookmarked items from 0-9
n r	New repository page
n g	New gist page

	Repositories
g s	Goto summary page
g c	Goto changelog page
g f	Goto files page
g F	Goto files page with file search activated
g p	Goto pull requests page
g o	Goto repository settings
g O	Goto repository access permissions settings
t s	Toggle sidebar on some pages

				# worker.py - master-slave parallelism support
				#
				# Copyright 2013 Facebook, Inc.
				#
				# This software may be used and distributed according to the terms of the
				# GNU General Public License version 2 or any later version.

				import os

				def countcpus():
				'''try to count the number of CPUs on the system'''

				# posix
				try:
				n = int(os.sysconf('SC_NPROCESSORS_ONLN'))
				if n > 0:
				return n
				except (AttributeError, ValueError):
				pass

				# windows
				try:
				n = int(os.environ['NUMBER_OF_PROCESSORS'])
				if n > 0:
				return n
				except (KeyError, ValueError):
				pass

				return 1